var SpinningSquare = Container.expand(function () {
	var self = Container.call(this);
	var squareGraphics = self.createAsset('square', 'Spinning Square', Math.random(), Math.random());
	squareGraphics.tint = Math.random() * 0xFFFFFF;
	squareGraphics.blendMode = 1;
	self.rotationSpeed = 0.01;
	self.rotate = function () {
		self.rotation += self.rotationSpeed;
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var spinningSquares = [];
	for (var i = 0; i < 2000; i++) {
		var spinningSquare = self.addChild(new SpinningSquare());
		spinningSquare.x = Math.random() * 2048;
		spinningSquare.y = Math.random() * 2732;
		spinningSquares.push(spinningSquare);
	}
	LK.on('tick', function () {
		for (var i = 0; i < spinningSquares.length; i++) {
			spinningSquares[i].rotate();
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -1,8 +1,9 @@
 var SpinningSquare = Container.expand(function () {
 	var self = Container.call(this);
 	var squareGraphics = self.createAsset('square', 'Spinning Square', Math.random(), Math.random());
 	squareGraphics.tint = Math.random() * 0xFFFFFF;
+	squareGraphics.blendMode = 1;
 	self.rotationSpeed = 0.01;
 	self.rotate = function () {
 		self.rotation += self.rotationSpeed;
 	};